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Commit b110b14e authored by René J.V. Bertin's avatar René J.V. Bertin

KSharedData Improvements on OS X:

* Add an emulated posix_fallocate() function from Mozilla source

REVIEW: 121930
parent 94aba11d
......@@ -33,6 +33,10 @@
#include <kdebug.h>
#ifdef __APPLE__
#include "posix_fallocate_mac.h"
// Our debug area, disabled by default
int ksdcArea();
......@@ -48,7 +52,7 @@ int ksdcArea();
#warning "No support for POSIX timeouts -- application hangs are possible if the cache is corrupt"
#include <pthread.h>
......@@ -77,7 +81,7 @@ int ksdcArea();
// posix_fallocate is used to ensure that the file used for the cache is
// actually fully committed to disk before attempting to use the file.
#if (defined(_POSIX_ADVISORY_INFO) && ((_POSIX_ADVISORY_INFO == 0) || (_POSIX_ADVISORY_INFO >= 200112L))) || defined(__APPLE__)
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
* The Original Code is Mozilla code.
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
* Contributor(s):
* Taras Glek <>
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
* ***** END LICENSE BLOCK ***** */
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
// 20150108 RJVB: created from the OSX-specific code from Mozilla's mozilla::fallocation() function
// of which the licensing information is copied above.
#ifdef cplusplus
extern "C" {
static int posix_fallocate(int fd, off_t offset, off_t len)
fstore_t store = {F_ALLOCATECONTIG, F_PEOFPOSMODE, offset, len};
// Try to get a continous chunk of disk space
int ret = fcntl(fd, F_PREALLOCATE, &store);
if(-1 == ret){
// OK, perhaps we are too fragmented, allocate non-continuous
store.fst_flags = F_ALLOCATEALL;
ret = fcntl(fd, F_PREALLOCATE, &store);
if (-1 == ret)
return false;
return 0 == ftruncate(fd, len);
#ifdef cplusplus
\ No newline at end of file
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